基于潜信道的新型数字签名算法

Research of digital signature based on subliminal channels

潜信道是在公开信道中所建立的一种实现隐蔽通信的信道 ,潜信道中所传递的潜信息也需要以数字签名的信息形式隐藏起来 ,研究基于潜信道条件下的新型数字签名算法具有非常重要的意义。文章介绍了有关潜信道方面的基本知识 ,并对目前研究的潜信道作了分类讨论 ;然后提出了基于宽带潜信道和窄带潜信道下的新型数字签名算法 ,对这两种算法从系统初始化、签名生成、签名校验以及潜信道密文信息恢复四个阶段进行详细阐述 ;从理论上分析了这两种算法的安全性。理论验证表明 :文章中提出的新型数字签名算法的安全性基于计算离散对数的困难性 。

Subliminal channel is a channel which is built in the public channel in order to realize secret communication. The subliminal information is hidden by the type of digital signature in the subliminal channel . It is important to study new digital signature in the subliminal channel . The basic knowledge of subliminal channel is introduced first. Secondly, two digital signature schemes with broadband subliminal channel and narrow subliminal channel are discussed in detail in the following aspects: system initialization?signature formation?signature verification and subliminal information recovery. And the security performance of these digital signature schemes is analyzed in theory. Lastly, theoretical study indicates that the security performance of both two new signature schemes proposed in this article are based on the difficulty of computing discrete logarithm, and therefore the two new signature schemes are provided with preferable security and theoretical significance.